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-4a/5=10
We move all terms to the left:
-4a/5-(10)=0
We multiply all the terms by the denominator
-4a-10*5=0
We add all the numbers together, and all the variables
-4a-50=0
We move all terms containing a to the left, all other terms to the right
-4a=50
a=50/-4
a=-12+1/2
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